Cylinder finishing tool



ug- 2, 1932- o. A. JOHNSON ET AL 1,869,377

CYLINDER FINISHING TOOL Filed Aug. l2, 1929 2 Sheets-Sheet l l I l mmu IIIIIIII All@ 2, 1932 o. A. JOHNSON ET AL 1,869,377

CYLINDER FINI SHING TOOL f Filed Aug. l2, 1929 2 Sheets-Sheet 2 "lliiii Patented Aug. 2, 1932v i UNITE@ stares Parietti" FFICEf.

vOLAI1 A. JOHNSON AND ROLLIN- n. LINGREN, on MINNEAPOLIS, MINNnsOTA, nssIerNoRsl To STORM MANUFACTURING OO., INC., OF MINNEAPOLIS, MINNESOTA, Avpoonronn'- TION OF MINNESOTA CYLINDER FINIsIIINe TOOL ppli'cation led August Y12, 1929. Serial No. 385;;130.

Our invention has for its object the provi' sion of an extremely simplel and highly ethcent cylinder finishing tool intended for general use, but especially well adapted for [j use to polish and iinish the cylindrical surfaces of new or rebored engine cylinders or Vfor trueing up slightly worn or scored cyl-A an engine block shown in central longitudinal section Fig. 2 is a view of theimproved tool prin-v cipally in central longitudinal section;

Fig. 3 is a view partly in `plan and partly in transverse section taken on the line 3 3 lof Fig. 2 and further illustrating, bymeans of broken lines, the cylinder wall and Figs. 4 and 5 are detail views in transverse section taken on the lines 4-'4t and 5--5,`respectively, of Fig. 2. I j

For the purpose of illustrating the finishing tool in working position; there is shown in Fig. 1 of the drawings an engine cylinder block 6 with the tool extending into the cylinder thereof. yAs shown,` the improved tool is carried and' rotated by a shaft 7 to which it is detachably applied by a ball and socket coupling 8. It may be assumed that the shaft 7 is driven by a portable electric mo-v tor, not shown.

y The improved tool includes a longbody member 9 that is square in cross-sectionvand provided with la longitudinally extended axial seat 10, which extends vcompletely through Saidmember and is also square in cross-section. This body member 9. at its outer end portions, has integrally formed therewith outwardly and axially projecting -screw studs 11, and is longitudinally split lthrough its axis and seat 10. The sections Vorr'nedwith the outer end of the screwcollar x scoped ontov the outer or closed end of the head 14 and detachably Secured thereto by a of the body member 9 are rigidly but detachably 'connectedIin assembled relation. by `a screw cap 12 and a screw collar 13 applied one to each ofjthe studs -11.. integrally v13 is a hollow head 14 ofcylindrical form axially aligned with the body member 9,'-and f the outer end of which is closed. Formed in the wallsof the headv 14 is a pair oi diametrically opposite passag'ewaysv 15gl which 'ex-f tendlongitudinally of said-head. `f` 'Y 'The socket member of the coupling 8y at its outer end7 is internallyv rabbeted and telepin? 16. Byv reference toj`Figs. 1- and 2, it

will be noted that the ballA memberfof the coupling 8jis detachably secured by a b ayonetfjointS to the socketv` v member thereof.'V`

The improved tool is provided with a plu-` rality of long hones'or grinding stones 17 j that' are relatively narrowand circumfer-V entially spaced about the axis of theV body member 9,'equal distances'apart and parallel to the axis otsaid member. l As shown, there I. are four 'of these hones removablymounted in individual channel-shaped grippers 18 and rigidly held therein by cemento'r other fastening means. Each gripper `18iis carried by a pair of plungers19 to the outer ends of which the backs of said'vgrippers are'rigidly secured. .These plungers 19 are round in cross-section and mounted in bore-like seats in thersections of the body member 9 forendwise sliding movement and project atright angles to the axisof the seat 10. Formed in the inner'fface'of each plunger 19 are oblique teeth 20 that project into the seat 10 in the body member y f The jolungersv 19 aresimultaneously andv positively projected to carry lthe hones .17 into contact with the cylindrical surface of a cylinder or Vretracted to carry thesame fout ot contact therewith bya'n endwise movable non-rotary shift bar 21. This shift bar 21. 95 which is square yin cross-section. is mounted in the seatlO-for endwise sliding movement, and' as both the'seat 10 and barv are square Vin cross-sectiom said bar is held'from turn'- king insald seat about the longitudinal axis 10 of the tool. Oblique'teeth 22 are formed on each Hat face of the bar 21 and mesh with the teeth 2O on the plungers 19. The teeth and 22 extend at angles of Ysubstantially Z.1.50, yand .the cam action, between .the intermeshing-teeth 520 vand 22, is such 'that an endwise sliding` movement of the bar 21 Vwill veither project or retract the plunger 19 `depending on whichfway said bar is moved.

By removing thecapf-12 Iand sleeve 13 Afrom Vthe body member 9, the sections of said member may be separated through the seat 10 to permit the removal'of the bar 21 from 'said seat. This r-emoval of the bar .21 separates the teeth 22 from the teeth 2O on `the plung` ers A119'and permits `said plu-Tigers to 'be yend-- .wise removed from ithesec'tions of the body memberr9. fObviously, 'thel distance `the .plungers 19 may .be endwise moved bythe barz21fduri-ng its endwise 'movement isequiv- :alent to .the :pitohfof @the :teeth 22. The rowsV @of teeth L20 on theplu-ngers 1:9.,permit'said plungers to be .endwise adiusted in :the 'body member A9 to position the hones 'x17 different Adistances fromthe .axisaof the tool betore the bar V21 is placed :in v'its sea'it :10 to :adjust said ttoo'l for Icylinders .of ld-ilierent diameters. f@he longitudinal rows fof teeth 22K-on :the bar '21 also permit said bar tofbe placed fin its :seat .10 fin 'different longitud-inal positions' `with lcertain of Aits teeth `22 in :mesh with vthe .A micrometer is provided for usting the eedvdevice for .thehones :17, which .includes .the bar '2:1, 1plungers..19,.and .fintermeshing .orometer includes asleeve `23 .and -a (2o-operating mut-.acting member 24 within said @slee-ve .and hav-ing screw-threaded :engagement therewith,Y Saidfs-leeve 23 surnou'nds the head :14, is'concentrictheretoand 'held against anial movement .the iconplfing .8 and cellar 13 between which it :is mounted. 'The-nutacting member .24e-is Vin the form of ,an 'ob- .ilong xbloclr, which feXtends -thmough the fpas- .-sageways v1.5, .is Aheld thereby again-st xturning movement .about the anis of the tool .du-ring the rotation of the slee-ve 23 thereon, .but is .free ter longitudinalslidinglmovement insa-id `gpassagleways during the ani-al '-.adj'u-stment of :said nut-actialg member bym-the V@rotation oi` :the sleeve J23 thereon. This nut-acting anem- :ber .24 is -detachablyfsecuredtothefbar .21

by a stem 25, which extends through 5anaxial 'bore in ,-saidnut-.actin-g member, is rigidly .secured..thereto-.by .a :pin 26 .and has screw- -th-reade'd engagement with [one end lof the ibar v21 V.at the :anis Lthereof..

periphery lof :the :sleeve iislnu-rled to ador-'d :a .suitable gripping surface 'by`V which ity may be '.tnrned -onV `the nut-.acting member 24. Y Formed y'on Ithe @periphery of -the sleeve 23, zat .ftheinnerend thereoi'i's an Y .annular scale 427 .and indicatedon :the collar 13 is .aco-operating-.zero gpoint. .Each gra-duation of the scale 27 represents, as shown, two one thousandths and during the feeding of the hones 17 to their work by the rotation of the sleeve 23, said yhones may be set to cut a predetermined depth. K

By reference to'Fig. :5, it will be inoted that the apeXes of the teeth 22 substantially contact with all of the walls of the seatA 10 with -the veXcepti on fof opposite portions thereof in one sectionoit the Vbody member 59. Y The seat 10 at this pointis increased iinwidth-to leave considerable clearance between said seat and v'the apexes oit the'teeth 22 so as to preventV 'turning' vthe sleeve 23 man l.opposite .direc-g 'tien with .sufiicient :pressure tocause .said honesto produce abutting action. .Asthe walls A.of the cylinder are .cu-t .away vby #the hones 41.7 .said hones are fed .to their work #by the .rotation of .the .sleeve 23. v'lhe .scale f 27 on the sleeve 23 will indicate when .the

, cylinders have been out .the required ,num-

yber of `.thoufsandths to -true .fthe .same up .and :to the desired `dia-meter. r,During the rotaL00 Y tion oi' the ftool in .acylind'er sbythe shaft 7, said tool may be moved axially up and-.down .in the cylinder to inish rthe .same throughout its entirelength and toa constant diameter.

rlherplungers 19 :by their'toothed engagement with the bar .21 :always `keep the .hohes 17 :a :uniform .distance from .the .axislot the tool and withoutgend gplay so xthat .the .outer .or cutting faces of said hones move .in the .same .orbit .and form a ftrue cylinder.

`What we claim is:

1. 'A .tool of-.the -class .described mounted for .orbital movement fand having a eed `device 'tor l.changing the :orbit o the tool'comprising an end-wise movable .non-'rotaryshiit bar, a non-rotary endwise movable plunger, j a cam-connection `between the lbarand ,plunger whereby a .reciprocatory endwiseV move- ;ment fof the bar will impart reciprocatory endwise movement vtofthe plunger, and a micrometer for endwise adjusting the .b ar l.compri-sing a .rotatable sleeve held against axial movement, anda co-operatizng .relative- Y ily ilined nut-actingA Amember V.having screwthreaded engagement therewith.

2A tool of 'the class .described mounted i.

for orbital movementand .comprising a .body

member having gan linternal sea-t, said bod-y Y member being llongitudifnally'split through said seat', acouphng .applied to each end @of threaded engagement with the nut-acting member and held against axial movement in respect to the tool whereby the rotary movement of the sleevewill impart an endwise movement to the bar.

3. A tool of the class described mounted for orbitalmovemeiit and comprising a body member having an axial seat, an endwise movable shift bar mounted in the seat and having a plurality of circumferentially spaced flat faces, said bar having on each face oblique teeth` circumferentially spaced abrading members having plungers mounted in transverse seats in the body member and having oblique teeth that mesh with the teeth on the bar, and means for endwise adjusting the bar.

4. A tool ofthe class described mounted for orbital movement and comprising a body member having an axial seat extending therethrough that is square in cross-section, an endwise movable square shift bar mounted in the seat and held thereby against rotation, said bar having oblique teeth on each face, circumferentially spaced abrading members having plungers mounted in transverseseats in the body member and having oblique teeth that mesh with the teeth on the bar, and means for endwise adjusting the bar. Y Y 5. A toolof the class described mounted for orbital movement and comprising a body member having an axial seat, said member being longitudinally split through its axial seat, an abrading member having a plunger mounted in a transverse seat in the body member, a shift bar mounted in the seat, intermeshing operating connections between the bar and plunger that are separable by a lateral movement of the plunger from the bar, means for endwise adjusting the bar, said bar comprising two detachably connected sections that are separable to disconnect the operating connections and permit the-bar to be removed from'its seat by a lateral movement, said transverse seat being constructed to hold-thc plunger against lateral Aremoval therefrom. s

6. A tool of the class described mount-ed for orbital movement and comprising a body member having an axialseat, said member `f being longitudinally split through its axial seat, Van abrading member'having a plunger i mounted in a transverse seat in the body member,a shiftbar mounted in the seat,in termeshing' operating connections between the bar and plunger that are separable by a lateral movement of the plunger from the bar, means for endwise adjusting the bar, said bar comprising twofsectionsthat are separable to disconnect the operating connections and permit the bar to be removed from its seat by a lateral movement, and couplings connecting the sections of the body member at the ends, said transverse seat being cony structed to hold the plunger against lateral '8o 7. The structureI defined in claim 6 in which l i V removal therefrom. Y

one of ,the couplings is any external sleeve which leaves the seatl in the respective end ofthe body member unobstruct-edand the "85.

other a cap'whichcloses the respective end of the body member, eachof said couplingsV having screw-threaded engagement with the body member.`

8. A tool of, the'fclass member havingn an internal seat, said body described mounted i I member being longitudinally split through n said seat, a coupling applied to each end of the body member for connecting the sections thereof, a vnon-rotary shiftbar mounted in said seat forendwise"movement, a plunger mounted in the body `member for endwise sliding movement,a camconnection` between j the bar and'plunger, a hollow head on one of the couplings and having va'pair of diametri-t cally opposite passageways, a driven shaft, a ball and socket coupling attaching said shaft to the head,`and a micrometer for endwise adjusting the bar coinprisingvanut-actn' said passageways and held thereby from A ling member on'the bar, slidably mounted in turning about the axisA of the tool, and a rotary sleeve surrounding the -liead and heldv againstaxial adjustment by this coupling on the head, said nut-'acting member ,and sleeve being connected by Vscrew-threads whereby rotary movement of the sleevewill impartan i endwise Vmovement tothe bar.

9. The structure defined in `claim' in whichv the ball and socketncoupling is detachably,

appliedV to the head to permit the removal of v the sleeve-from the tool. v

for orbital movement and comprising a body member having an axial seat, a non-rotary endwise movable shift bark mounted in ,saidseat, said member having a head with dia- 'v metrically opposite slots, anut-acting member extending through said slots,`a stem having screw-threaded engagement with the bar j at the axis thereof and extending through an axial seatin the nut-acting member and de- Y ktacliably secured to said member, means having threaded engagement with the nut-acting membei and; operable to axially adjust said LVuns member and the connected shift Y bar, an abradng, member, and an operating connecef tion flom they bar to the abradng member.

In testimony whereof We affix our; sgnatures.

OLAF A. J OHNSON ROLLIE E. LINGREN. 

